A rubber composition which comprises a rubber ingredient comprising a diene rubber and a reinforcing agent comprising silica; said diene rubber being a copolymer comprising (1) 30 to 85% by weight of conjugated diene monomer units, (2) 15 to 50% by weight of aromatic vinyl monomer units and (3) 0.05 to 20% by weight of units of a vinyl monomer having a polar group, and the diene rubber having in the molecule an alkylthio group having 12 to 16 carbon atoms, which include at least three tertiary carbon atoms, and having a sulfur atom which is directly bound to at least one of the tertiary carbon atoms.
一种橡胶组合物,其橡胶成分包括二烯橡胶和由
二氧化硅组成的补强剂;所述二烯橡胶是一种共聚物,包括 (1) 30 至 85% (重量百分比)共轭二烯单体单元、(2) 15 至 50% (重量百分比)芳香
乙烯基单体单元和 (3) 0.05%至 20%(重量百分比)具有极性基团的
乙烯基单体单元,二烯橡胶分子中具有 12 至 16 个碳原子的烷
硫基,其中包括至少三个叔碳原子,并具有直接与至少一个叔碳原子结合的
硫原子。